Perplexing Sudoku-by5 Logic Puzzles (Vol 1) 
 Chapter 3: Twenty Perplexing (DiffLev 45-47) Sudoku-by5 Puzzles (numbers 1-20) 
 
-  Step-by-step instructions for solving  Puzzle 1, (268/369)   Diff: 45/9.7575.7585.7667.8999.9844.5985.976A.1136+
 -  Step-by-step instructions for solving  Puzzle 2, (269/369)   Diff: 45/9.931D.11C3.4345.3441.1635.5689.9998.8689+
 -  Step-by-step instructions for solving  Puzzle 3, (275/369)   Diff: 45/9.9999.9733.3563.5632.D258.9999.9996.AB11+
 -  Step-by-step instructions for solving  Puzzle 4, (264/369)   Diff: 46/99.5699.7797.7963.C231.2558.4942.7898.9411+
 -  Step-by-step instructions for solving  Puzzle 5, (266/369)   Diff: 46/99.9845.3445.4474.4A12.2221.2355.4433.5544+
 -  Step-by-step instructions for solving  Puzzle 6, (268/369)   Diff: 46/98.3562.122D.2264.4699.7943.4645.6437.9978+
 -  Step-by-step instructions for solving  Puzzle 7, (271/369)   Diff: 46/96.6233.6886.7999.3412.1587.6246.9996.2131+
 -  Step-by-step instructions for solving  Puzzle 8, (272/369)   Diff: 46/99.632B.242B.1221.3589.6221.1269.5654.4986+
 -  Step-by-step instructions for solving  Puzzle 9, (273/369)   Diff: 46/99.8565.6899.9999.7989.8752.1D22.11B2.4113+
 -  Step-by-step instructions for solving  Puzzle 10, (273/369)   Diff: 46/99.742C.4679.7999.9996.8634.3BC2.4479.5553+
 -  Step-by-step instructions for solving  Puzzle 11, (268/369)   Diff: 47/979.5331.C41B.2999.9999.7622.4653.1267.5B37+
 -  Step-by-step instructions for solving  Puzzle 12, (269/369)   Diff: 47/998.2322.7642.5654.7683.432D.5571.2134.5555+
 -  Step-by-step instructions for solving  Puzzle 13, (271/369)   Diff: 47/943.3233.4446.6334.6799.6735.5368.8999.8987+
 -  Step-by-step instructions for solving  Puzzle 14, (273/369)   Diff: 47/995.4231.B111.1544.5693.1112.3328.9989.8999+
 -  Step-by-step instructions for solving  Puzzle 15, (273/369)   Diff: 47/957.6653.2223.221D.4979.8799.9967.9976.311D+
 -  Step-by-step instructions for solving  Puzzle 16, (274/369)   Diff: 47/999.8764.6766.8433.2211.11D6.9994.5857.8567+
 -  Step-by-step instructions for solving  Puzzle 17, (274/369)   Diff: 47/999.8421.111C.2453.3336.34B3.2231.1389.9658+
 -  Step-by-step instructions for solving  Puzzle 18, (274/369)   Diff: 47/997.7343.2322.4435.8864.6222.3697.2D69.9959+
 -  Step-by-step instructions for solving  Puzzle 19, (277/369)   Diff: 47/999.9956.9897.7969.8977.5414.6665.71C3.5872+
 -  Step-by-step instructions for solving  Puzzle 20, (278/369)   Diff: 47/999.9736.9999.9823.8999.8111.2223.3632.D223+